Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1986-02-12
1987-06-09
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 68, 118 58, 4273722, F26B 700
Patent
active
046709940
ABSTRACT:
A method of heating a drying furnace for use in hot air-circulating type coating drying in which a hot air is supplied, under circulation, to the inside of the furnace thereby heating and drying coated articles, wherein heating for the furnace is conducted through a direct heating type hot air-circulating path in which the air inside of the furnace sucked from a return duct is heated directly by a combustion gas from a burner and supplied under circulation from a supply duct again to the inside of the furnace while conducting a step of increasing the temperature by pre-heating the inside of the furnace, whereas heating for the furnace is conducted through an indirect heating type hot air circulating path in which the air inside of the furnace sucked from the return duct is heated in a heat exchanger and then supplied, under circulation, through the supply duct again to the inside of the furnace while conducting a coating drying step when the temperature inside of the furnace reaches a predetermined temperature.
REFERENCES:
patent: 3917444 (1975-11-01), Carthew
patent: 3942264 (1976-03-01), Zenkner
patent: 4255132 (1981-03-01), Carthew
Katoh Kaname
Tachi Hideo
Takata Hideyuki
Tokushima Yasuo
Schwartz Larry I.
Toyota Motor Corporation
Trinity Industrial Corporation
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